package cn.mingfancloud.bilibili_java.javabase.ClassesAndObjects.Staticday2;

public class ArrayUtil {
    // 私有化
    private ArrayUtil(){}

    public static String printArr(int[] arr) {
        StringBuilder sb = new StringBuilder();
        sb.append("[");
        for (int i = 0; i < arr.length; i++) {
            if (i == arr.length - 1) {
                sb.append(arr[i]);

            }else {
                sb.append(arr[i]).append(",");

            }
        }
        sb.append("]");
        return sb.toString();
    }

    public static double getAverage(double[] arr){
        double sum = 0;
        for (int i = 0; i < arr.length; i++) {
            sum = sum +arr[i];

        }
        return sum / arr.length;
    }
}
